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5,496
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Media Type
5,261
texts
134
movies
85
audio
11
images
4
data
1
web
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Topics & Subjects
3,869
NASA Technical Reports Server (NTRS)
2,020
HYDROGEN
804
LIQUID HYDROGEN
380
OXYGEN
364
DTIC Archive
310
NICKEL HYDROGEN BATTERIES
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Collection
3,869
NASA Network Resource and Training Site
573
NASA Technical Documents
364
Defense Technical Information Archive
127
American Libraries
87
FEDLINK - United States Federal Collection
85
Folkscanomy: A Library of Books
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Creator
3,869
nasa technical reports server (ntrs)
364
defense technical information center
74
non
22
submedia
14
nasa larc office of education
10
massimo morigi
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Language
5,283
English
5
Italian
4
German
3
French
1
Handwritten English
1
Php
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